Magnetic resonance imaging methods have taken a commanding position in brain studies because they allow scientists to follow brain activities in the living human. The ability to measure cerebral anatomy, neuronal firing, and brain metabolism has extended and re-invigorated hopes of understanding the role that brain activity plays in human life. The brain has assumed a central role in our thinking of the world that can be traced back to the philosophies that are expressed in psychology, religion, literature, and everyday life. Brain scientists, planning and measuring brain activities by...